Ethyl orthoformate → Ethyl 2-(2,6-dichloropyridine-3-carbonyl)-3-ethoxyprop-2-enoate
反応式
[Cl:1][C:2]1[N:15]=[C:14]([Cl:16])[CH:13]=[CH:12][C:3]=1[C:4]([CH2:6][C:7]([O:9][CH2:10][CH3:11])=[O:8])=[O:5].[CH:17](OCC)(OCC)[O:18][CH2:19][CH3:20]>C(OC(=O)C)(=O)C>[Cl:1][C:2]1[N:15]=[C:14]([Cl:16])[CH:13]=[CH:12][C:3]=1[C:4]([C:6](=[CH:17][O:18][CH2:19][CH3:20])[C:7]([O:9][CH2:10][CH3:11])=[O:8])=[O:5]参加物
4
反応条件
- 温度
- 140 °C
実験手順
Ethyl 2-(2,6-dichloronicotinoyl)acetate (7.03 g, 26.8 mmol) was dissolved in acetic anhydride (30 ml), and after adding triethyl orthoformate (60 ml) thereto, it was stirred in an oil bath of 140° C. for 2 hours. After letting the reaction solution cool, it was concentrated under a reduced pressure, and after adding toluene (50 ml) to the residue obtained, a concentration operation under a reduced pressure was performed. This operation was repeated 3 times, and the residue obtained was dried under a reduced pressure. 8.42 g of ethyl 2-(2,6-dichloronicotinoyl)-3-ethoxyacrylate was thereby obtained in the form of a yellow oily substance.